161231946 has 8 divisors (see below), whose sum is σ = 322463904. Its totient is φ = 53743980.

The previous prime is 161231933. The next prime is 161231951. The reversal of 161231946 is 649132161.

161231946 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

161231946 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13435990 + ... + 13436001.

It is an arithmetic number, because the mean of its divisors is an integer number (40307988).

Almost surely, 2^161231946 is an apocalyptic number.

161231946 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161231946 is a wasteful number, since it uses less digits than its factorization.

161231946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26871996.

The product of its digits is 7776, while the sum is 33.

The square root of 161231946 is about 12697.7142037455. The cubic root of 161231946 is about 544.2733024242.

The spelling of 161231946 in words is "one hundred sixty-one million, two hundred thirty-one thousand, nine hundred forty-six".